6465225645 has 24 divisors (see below), whose sum is σ = 11221531776. Its totient is φ = 3443461728.

The previous prime is 6465225623. The next prime is 6465225661. The reversal of 6465225645 is 5465225646.

6465225645 is a `hidden beast` number, since 6 + 4 + 65 + 22 + 564 + 5 = 666.

It is not a de Polignac number, because 6465225645 - 2⁶ = 6465225581 is a prime.

It is a super-3 number, since 3×6465225645³ (a number of 30 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6465225645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63249 + ... + 130118.

It is an arithmetic number, because the mean of its divisors is an integer number (467563824).

Almost surely, 2^6465225645 is an apocalyptic number.

It is an amenable number.

6465225645 is a deficient number, since it is larger than the sum of its proper divisors (4756306131).

6465225645 is a wasteful number, since it uses less digits than its factorization.

6465225645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194121 (or 194118 counting only the distinct ones).

The product of its digits is 1728000, while the sum is 45.

The square root of 6465225645 is about 80406.6268724164. The cubic root of 6465225645 is about 1862.9215316632.

Subtracting from 6465225645 its reverse (5465225646), we obtain a palindrome (999999999).

The spelling of 6465225645 in words is "six billion, four hundred sixty-five million, two hundred twenty-five thousand, six hundred forty-five".